Sorento 4WD V6-3.3L (2008)
Tire Pressure Monitor Receiver / Transponder: Description and Operation
TPMS Initiator
DESCRIPTION
Initiators are used to radiate magnetic energy to the wheel sensors. The wheel initiators are used to communicate with the TPM wheel sensors. The wheel
initiators receive a low energy control signal from the receiver. This signal is amplified and radiated as magnetic energy to initiate RF response from a
wheel sensor.
1. Overview
A. Only High Line systems are fitted with an LFI.
B. The LFI is located in the wheel well of each tire, to enable the receiver to determine the vehicle position of each TPMS sensor for which it has
a stored TPMS sensor ID code.
C. When first turned on, the receiver activates the LFI's to wake up the TPMS sensors and get wheel status.
D. The LFI's are activated every 10 minutes to keep the TPMS sensors awake while the key is on.
2. Operating mode
A. When triggered by the receiver the LFI broadcasts a 125 KHz signal through the tire to the TPMS sensors to wake them up.
B. After broadcasting the LFI returns to sleep mode until triggered again by the receiver.
C. Once the TPMS sensor has received the 125 KHz wake up signal, it broadcasts its ID and status.This information plus which LFI triggered it
allows the receiver to record which tire has which sensor.
OPERATION
1. Type 1 learn mode
A. TPMS sensor learning via K-line diagnostic bus using TPMS Exciter.
2. Type 2 learn mode
A. Learn via LFI wand
B. Enter type 2 learn mode via K-line command.
C. Trigger each TPMS sensor in the following order FL, FR, RL, and RR with the LFI wand.
D. Exit type II learn mode.
3. Type 3 learn mode (High line only)
A. Enter type 3 learn mode via K-line command.
B. Receiver triggers each LFI and programs TPMS sensors and received.
